CA2255859A1 - Extrusion molding article from wood-polymer resin and method for producing the same - Google Patents
Extrusion molding article from wood-polymer resin and method for producing the same Download PDFInfo
- Publication number
- CA2255859A1 CA2255859A1 CA002255859A CA2255859A CA2255859A1 CA 2255859 A1 CA2255859 A1 CA 2255859A1 CA 002255859 A CA002255859 A CA 002255859A CA 2255859 A CA2255859 A CA 2255859A CA 2255859 A1 CA2255859 A1 CA 2255859A1
- Authority
- CA
- Canada
- Prior art keywords
- extrusion molding
- wood powder
- resin
- glazed
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000001125 extrusion Methods 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 4
- 229920003002 synthetic resin Polymers 0.000 title description 3
- 239000002952 polymeric resin Substances 0.000 title 1
- 229920005989 resin Polymers 0.000 claims abstract description 44
- 239000011347 resin Substances 0.000 claims abstract description 44
- 239000000843 powder Substances 0.000 claims abstract description 38
- 239000002023 wood Substances 0.000 claims abstract description 33
- 239000000463 material Substances 0.000 claims abstract description 19
- 239000002245 particle Substances 0.000 claims abstract description 7
- 239000004604 Blowing Agent Substances 0.000 claims abstract description 6
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 6
- 239000001913 cellulose Substances 0.000 claims description 3
- 229920002678 cellulose Polymers 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000000465 moulding Methods 0.000 description 9
- 239000003973 paint Substances 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000005187 foaming Methods 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 235000013339 cereals Nutrition 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 241000894007 species Species 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 241000609240 Ambelania acida Species 0.000 description 1
- 101100273797 Caenorhabditis elegans pct-1 gene Proteins 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 241000518994 Conta Species 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 239000010905 bagasse Substances 0.000 description 1
- CJOBVZJTOIVNNF-UHFFFAOYSA-N cadmium sulfide Chemical compound [Cd]=S CJOBVZJTOIVNNF-UHFFFAOYSA-N 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- NEHMKBQYUWJMIP-UHFFFAOYSA-N chloromethane Chemical compound ClC NEHMKBQYUWJMIP-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000001023 inorganic pigment Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/28—Moulding or pressing characterised by using extrusion presses
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The object of the present invention is to provide an extrusion molding article having an appearance resembling to natural timbers, and a method for producing the same. The molded article of resins by an extrusion molding is produced as follows: The glazed portion comprising at least a glazed face is produced with a resin material containing wood powder in which the resin is blended with the wood powder. The resin material containing wood powder comprises 20 to 40 parts of the wood powder having a particle size of 20 meshes or less and 0.5 to 4 parts of a blowing agent in 100 parts of a thermoplastic resin. The glazed face is formed by removing skin layers formed during the extrusion molding.
Description
WO9U~ PcT1~n~1076 DESCRIPTlON
EXTRUSION MOLDING A~TICLE FROM WOOD-POLYMER R~SIN AN~ METHOO FOR PROOUCIN6 T~E SAME
Technical Field ~ he present inventlon relate~ to an art ~or produclng an extrusion molding article Or resins. In ~ore detail, the ln~entlon is characterlzed by blending wood powder and a small amount o~ a blowing agent in a res1n material ~or extrusion, ~ollowed by removing skln layers ~ormed on the suriace Or the ~o}ded article.
Background Art ~ ome building components, in which e~trusion molding articles o~ resln materials cont~intng wood powder are ~requently used, are described below as a related art.
~ xtrusion molding articles of synthetic resins have been ~requentlY used ~or highly processed building components like a door sash instead o~ wooden components made o~ natural timbers. The ~aterials ~or these extrusion molding ~rticles o~ synthetic resins are, ~or example, a hard ~inyl chloride resin with which several tens percentage o~ wood powder is blended. T~e e~trusion molding article comprising the aforementioned materials can be previously formed into a desired shape ~hile the natural timbers require several times of pl ~ning steps. Thereiore, processing steps a~ter the molding can be larsely reduced in addition to enabling the article to be cut with a sa~ or to be ~ixed with nails, which makes the construction 90 easy.
However, the new article according to the art described above yet involves se~eral problems that its speci~ic gra~ity is so large cumpared with that of timbers and its sur~ace becomes so hard by ~orming skin layers on the surface that an wood-like touch is lost. Moreover, since its compatibility wlth vinyl acetate based adheslves or paints that are commonly used ~or the wooden components is low, sdhesion or painting with the resin was di~ficult.
Therefore, the uses o~ this new article were limited.
Disclosure of Invention -Accor~nFly, the ob~ect o~ the present invention ~s to provide an art for producing sn e~trusion molding article havin~ properties more resembllng to natural ti~bers.
The deficiencies o~ the e~trusion molding article o~
resins Cont~n1nF wood -powder have been solved -by the W0~7~ - PCT/JW~1~C
present 1nvention characte~ized by ~aking the degree of foaming of the molded article low and removing the skin layers rormed on the s~r~ace oi the molded article. Foaming yields wood like properties in the article by reducing its specific gravity. Moreover, the skin layers rormed on the sur~ace becomes so thln that they can easily be removed by brn~h~ n F
(E~planation Or Claim 1) The present lnventlon according to Claim 1 provides a molded article for~ed by an e~trusion molding o~ resins, characterized in that a glazed portion that ~orms at least a glazed ~ace is composed o~ a resin materlal containing wood powder in which the resin is mi~ed wlth the wood powder: the resln conta~nlng wood powder ~eing composed o~ 20 to 40 parts o~ the wood powder having a particle size o~ 20 meshes or less and 0.5 to 4 parts of a blowlng agent in 100 parts o~ a thermoplastic resin; and the glazed face being rormed by removlng skin layers formed during the extrusion molding.
The foregoing "glazed portion" denotes a visible portlon when molded articles o~ resins formed by the extrusion molding o~ resins according to the present lnvention are brought in a circumstance where their inherent ~unctions can be exhibited.
(Explanation of Claim 2) The present invention according to Claim 2 is provided ror technically limiting the invention according to claim 1, wherein the glazed portlon ls rormed by a monolithic extrusion molding with the other portions of the resin.
When the glazed portion and the other portion are composed o~ di~erent materials with each other, both portions are rormed by a monolithic extrusion.
~ E~planation of Claim 3) The present invention according to Claim 3 is provided ror technically,limiting the invention according to Claim 1 or Claim 2, whereln the glazed portlon and the ~ther portions are composed o~ a resin material cont~ln~ng wood powder that ~or~s the glazed portion.
In this case, the Klazed portlon and the other portion are composed o~ an identical material, the whole being produced by using the material comprislng the glazed portion.
(Explanation o~ Claim 4) The present invention acc~rding to Claim 4 is characterized in that the wood powder ln the resln cont~ n 1 ng wood powder that cumprises the glazed portion is produced by grinding the crushed powder obtained by crushing a cellulose material; and by adhering surface grains having a smaller particle size and higher hardness than those of the crushed powder on the peripheral surface of the crushed powder.
The "cellulose material" described herein denotes natural woods as well as such materials including sawdust, rice straws and bagasse.
The "resin" includes hard resins, for example, such as polyvinyl chloride resin, foamed polyvinyl chloride resin, polyethylene resin, polypropylene resin, phenol resin, urethane resin, polyurethane resin, ABS resin and polystylene resin. Soft type resin may be also used depending on the molded articles required.
The "surface grains" correspond to titanium oxide, aluminum, nickel, silver, ferrites, thermoplastic resins or ceramics.
The proportion of the wood powder to be blended with the resin to the total molded article is adjusted not to exceed 30% by weight since molding processes may be interfered with a low fluidity during the molding.
"Pigments" denote colored pigments, examples of them being inorganic pigments such as iron oxide, cadmium yellow and carbon black.
(Explanation of Claim 5) The present invention according to Claim 5 provides a method for producing a molded article formed by an extrusion molding of resins comprising the steps of:
preparing a resin material containing wood powder composed of 20 to 40 parts of the wood powder having a particle size of 20 meshes or less and 0.5 to 4 parts of a blowing agent in 100 parts of a thermoplastic resin; extrusion molding a glazed portion that forms at least a glazed face by using a resin material containing wood powder; and removing the skin layers formed during the extrusion molding step.
While the extrusion molding article in which a hard vinyl chloride resin with a low degree of foaming is used as a resin contains independently dispersed air bubbles, the air bubbles in the molded article according to the present invention appear to be continuous because wood powder is blended with the resin to connect the air cells with the wood powder. Therefore, the surface of the molded article resembles that of the wooden articles both in its touch sense and visual appearance because capillary like pores are exposed on the surface of the molded article after removing skin layers. When paints or adhesives are coated on this WO 9V43792 - PCT1J~7J~10 76 surrace, the coating rilm tightly adheres on the sur~ace because a part Or the coating ~ilm penetrates deep into the pore.
Best Mode ~or Carrying Out the In~ention Blended in a ml~er are 100 parts o~ hard vinyl chloride, 30 parts o~ wood powder having a partlcle size o~
meshes or less, 1 part of a blowing agent (azodlcarboxyllc acid amide~ and each 5 parts Or a stabilizer, lubricant and reinrorcer. The mixture is heated by a conventional method and, arter coollng, is placed in an e~truder, thereby ~orming a ~olded artlcle of hard vinyl chloride resin having a desired shape wlth a low degree o~
roamlng. Skin layers rormed on the suriace Or the mo~ded article was then removed by a wire brush to obtain a rinal product.
This product has an appearance similar to natural timbers since it has a speci~ic gravity within 0.5 to 1Ø
The sur~ace Or the molded article resembles that of the wooden articles both in its touch sense and ~isual appearance because continuous capillary llke pores are exposed on the sur~ace o~ the molded article aiter removing skin layers. When paints or adhesives are coated on th1s sur~ace, the adheslve strength ~g~n~t the surface was enhanced because a~ wedge e~rect ~as e2hibited by partly penetrating the layer of the adhesive or paint deep into the pore.
The product produced as described above has a he~t eYr~n~ion coeriicient 1/2 to lJ3 times that of the conventional products. Thererore, the molded article according to the present invention ls widely applicable because peeling of~ by temperature changes is not likely to occur when the molded article is adhered on timbers or metals.
Through the ~oint parts Or the inter~or pack~ing Or the building has been liable to generate gaps by a heat e~p~n~ion when conventional resin products are used an~ a construction method similar with that o~ natural timbers were impossible, the products according to the present inve~tion enables a con~truction wlth a good ~ppearance without creating any gaps.
Industrial Applicability Accor~ingly, the present invention provides a e2trusion moldlng artic~e havlng an appearance resembling to natural tim~ers and a method rOr producing the same. -
EXTRUSION MOLDING A~TICLE FROM WOOD-POLYMER R~SIN AN~ METHOO FOR PROOUCIN6 T~E SAME
Technical Field ~ he present inventlon relate~ to an art ~or produclng an extrusion molding article Or resins. In ~ore detail, the ln~entlon is characterlzed by blending wood powder and a small amount o~ a blowing agent in a res1n material ~or extrusion, ~ollowed by removing skln layers ~ormed on the suriace Or the ~o}ded article.
Background Art ~ ome building components, in which e~trusion molding articles o~ resln materials cont~intng wood powder are ~requently used, are described below as a related art.
~ xtrusion molding articles of synthetic resins have been ~requentlY used ~or highly processed building components like a door sash instead o~ wooden components made o~ natural timbers. The ~aterials ~or these extrusion molding ~rticles o~ synthetic resins are, ~or example, a hard ~inyl chloride resin with which several tens percentage o~ wood powder is blended. T~e e~trusion molding article comprising the aforementioned materials can be previously formed into a desired shape ~hile the natural timbers require several times of pl ~ning steps. Thereiore, processing steps a~ter the molding can be larsely reduced in addition to enabling the article to be cut with a sa~ or to be ~ixed with nails, which makes the construction 90 easy.
However, the new article according to the art described above yet involves se~eral problems that its speci~ic gra~ity is so large cumpared with that of timbers and its sur~ace becomes so hard by ~orming skin layers on the surface that an wood-like touch is lost. Moreover, since its compatibility wlth vinyl acetate based adheslves or paints that are commonly used ~or the wooden components is low, sdhesion or painting with the resin was di~ficult.
Therefore, the uses o~ this new article were limited.
Disclosure of Invention -Accor~nFly, the ob~ect o~ the present invention ~s to provide an art for producing sn e~trusion molding article havin~ properties more resembllng to natural ti~bers.
The deficiencies o~ the e~trusion molding article o~
resins Cont~n1nF wood -powder have been solved -by the W0~7~ - PCT/JW~1~C
present 1nvention characte~ized by ~aking the degree of foaming of the molded article low and removing the skin layers rormed on the s~r~ace oi the molded article. Foaming yields wood like properties in the article by reducing its specific gravity. Moreover, the skin layers rormed on the sur~ace becomes so thln that they can easily be removed by brn~h~ n F
(E~planation Or Claim 1) The present lnventlon according to Claim 1 provides a molded article for~ed by an e~trusion molding o~ resins, characterized in that a glazed portion that ~orms at least a glazed ~ace is composed o~ a resin materlal containing wood powder in which the resin is mi~ed wlth the wood powder: the resln conta~nlng wood powder ~eing composed o~ 20 to 40 parts o~ the wood powder having a particle size o~ 20 meshes or less and 0.5 to 4 parts of a blowlng agent in 100 parts o~ a thermoplastic resin; and the glazed face being rormed by removlng skin layers formed during the extrusion molding.
The foregoing "glazed portion" denotes a visible portlon when molded articles o~ resins formed by the extrusion molding o~ resins according to the present lnvention are brought in a circumstance where their inherent ~unctions can be exhibited.
(Explanation of Claim 2) The present invention according to Claim 2 is provided ror technically limiting the invention according to claim 1, wherein the glazed portlon ls rormed by a monolithic extrusion molding with the other portions of the resin.
When the glazed portion and the other portion are composed o~ di~erent materials with each other, both portions are rormed by a monolithic extrusion.
~ E~planation of Claim 3) The present invention according to Claim 3 is provided ror technically,limiting the invention according to Claim 1 or Claim 2, whereln the glazed portlon and the ~ther portions are composed o~ a resin material cont~ln~ng wood powder that ~or~s the glazed portion.
In this case, the Klazed portlon and the other portion are composed o~ an identical material, the whole being produced by using the material comprislng the glazed portion.
(Explanation o~ Claim 4) The present invention acc~rding to Claim 4 is characterized in that the wood powder ln the resln cont~ n 1 ng wood powder that cumprises the glazed portion is produced by grinding the crushed powder obtained by crushing a cellulose material; and by adhering surface grains having a smaller particle size and higher hardness than those of the crushed powder on the peripheral surface of the crushed powder.
The "cellulose material" described herein denotes natural woods as well as such materials including sawdust, rice straws and bagasse.
The "resin" includes hard resins, for example, such as polyvinyl chloride resin, foamed polyvinyl chloride resin, polyethylene resin, polypropylene resin, phenol resin, urethane resin, polyurethane resin, ABS resin and polystylene resin. Soft type resin may be also used depending on the molded articles required.
The "surface grains" correspond to titanium oxide, aluminum, nickel, silver, ferrites, thermoplastic resins or ceramics.
The proportion of the wood powder to be blended with the resin to the total molded article is adjusted not to exceed 30% by weight since molding processes may be interfered with a low fluidity during the molding.
"Pigments" denote colored pigments, examples of them being inorganic pigments such as iron oxide, cadmium yellow and carbon black.
(Explanation of Claim 5) The present invention according to Claim 5 provides a method for producing a molded article formed by an extrusion molding of resins comprising the steps of:
preparing a resin material containing wood powder composed of 20 to 40 parts of the wood powder having a particle size of 20 meshes or less and 0.5 to 4 parts of a blowing agent in 100 parts of a thermoplastic resin; extrusion molding a glazed portion that forms at least a glazed face by using a resin material containing wood powder; and removing the skin layers formed during the extrusion molding step.
While the extrusion molding article in which a hard vinyl chloride resin with a low degree of foaming is used as a resin contains independently dispersed air bubbles, the air bubbles in the molded article according to the present invention appear to be continuous because wood powder is blended with the resin to connect the air cells with the wood powder. Therefore, the surface of the molded article resembles that of the wooden articles both in its touch sense and visual appearance because capillary like pores are exposed on the surface of the molded article after removing skin layers. When paints or adhesives are coated on this WO 9V43792 - PCT1J~7J~10 76 surrace, the coating rilm tightly adheres on the sur~ace because a part Or the coating ~ilm penetrates deep into the pore.
Best Mode ~or Carrying Out the In~ention Blended in a ml~er are 100 parts o~ hard vinyl chloride, 30 parts o~ wood powder having a partlcle size o~
meshes or less, 1 part of a blowing agent (azodlcarboxyllc acid amide~ and each 5 parts Or a stabilizer, lubricant and reinrorcer. The mixture is heated by a conventional method and, arter coollng, is placed in an e~truder, thereby ~orming a ~olded artlcle of hard vinyl chloride resin having a desired shape wlth a low degree o~
roamlng. Skin layers rormed on the suriace Or the mo~ded article was then removed by a wire brush to obtain a rinal product.
This product has an appearance similar to natural timbers since it has a speci~ic gravity within 0.5 to 1Ø
The sur~ace Or the molded article resembles that of the wooden articles both in its touch sense and ~isual appearance because continuous capillary llke pores are exposed on the sur~ace o~ the molded article aiter removing skin layers. When paints or adhesives are coated on th1s sur~ace, the adheslve strength ~g~n~t the surface was enhanced because a~ wedge e~rect ~as e2hibited by partly penetrating the layer of the adhesive or paint deep into the pore.
The product produced as described above has a he~t eYr~n~ion coeriicient 1/2 to lJ3 times that of the conventional products. Thererore, the molded article according to the present invention ls widely applicable because peeling of~ by temperature changes is not likely to occur when the molded article is adhered on timbers or metals.
Through the ~oint parts Or the inter~or pack~ing Or the building has been liable to generate gaps by a heat e~p~n~ion when conventional resin products are used an~ a construction method similar with that o~ natural timbers were impossible, the products according to the present inve~tion enables a con~truction wlth a good ~ppearance without creating any gaps.
Industrial Applicability Accor~ingly, the present invention provides a e2trusion moldlng artic~e havlng an appearance resembling to natural tim~ers and a method rOr producing the same. -
Claims (5)
1. A molded article formed by an extrusion molding of resins, characterized in that a glazed portion that forms at least a glazed face is composed of a resin material containing a wood powder in which the resin is mixed with the wood powder:
the resin containing the wood powder being composed of 20 to 40 parts of the wood powder having a particle size of 20 meshes or less and 0.5 to 4 parts of a blowing agent in 100 parts of a thermoplastic resin; and the glazed race being formed by removing skin layers formed during the extrusion molding.
the resin containing the wood powder being composed of 20 to 40 parts of the wood powder having a particle size of 20 meshes or less and 0.5 to 4 parts of a blowing agent in 100 parts of a thermoplastic resin; and the glazed race being formed by removing skin layers formed during the extrusion molding.
2. An extrusion molding articles of resins according to Claim 1, wherein the glazed portion is formed by a monolithic extrusion molding with the other portions of the resin.
3. An extrusion molding article of resins according to Claim 1 or claim 2, wherein the glazed portion and the other portions are composed of a resin material containing wood powder that forms the glazed portion.
4. An extrusion molding resin according to Claim 1, Claim 2 or Claim 3, wherein the wood powder in the resin containing wood powder that comprises the glazed portion is produced by grinding the crushed powder obtained by crushing a cellulose material; and by adhering surface grains having a smaller particle size and higher hardness than those of the crushed powder on the peripheral surface of the crushed powder.
5. A method for producing a molded article formed by an extrusion molding of resins comprising the steps of:
preparing a resin material containing wood powder composed of 20 to 40 parts or the wood powder having a particle size of 20 meshes or less and 0.5 to 4 parts of a blowing agent in 100 parts of a thermoplastic resin;
extrusion molding a glazed portion that forms at least a glazed face by using a resin material containing wood powder ; and removing the skin layers formed during the extrusion molding step.
preparing a resin material containing wood powder composed of 20 to 40 parts or the wood powder having a particle size of 20 meshes or less and 0.5 to 4 parts of a blowing agent in 100 parts of a thermoplastic resin;
extrusion molding a glazed portion that forms at least a glazed face by using a resin material containing wood powder ; and removing the skin layers formed during the extrusion molding step.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP1997/001076 WO1998043792A1 (en) | 1997-03-28 | 1997-03-28 | Extrusion molding article from wood-polymer resin and method for producing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2255859A1 true CA2255859A1 (en) | 1998-10-08 |
Family
ID=14180327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002255859A Abandoned CA2255859A1 (en) | 1997-03-28 | 1997-03-28 | Extrusion molding article from wood-polymer resin and method for producing the same |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU2176797A (en) |
| CA (1) | CA2255859A1 (en) |
| WO (1) | WO1998043792A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000030557A (en) * | 2000-03-07 | 2000-06-05 | 이장호 | Method of manufacturing building elements using natural plants |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6282019A (en) * | 1985-10-07 | 1987-04-15 | Misawa Homes Co Ltd | Decoration method for resin molded material |
| JPH0741657B2 (en) * | 1986-07-14 | 1995-05-10 | ミサワホーム株式会社 | Low-foam rigid vinyl chloride resin extrusion molding process |
| JP2545525B2 (en) * | 1987-01-19 | 1996-10-23 | ミサワホーム株式会社 | Method of manufacturing extruded product with embossing pattern |
| JPH07103242B2 (en) * | 1992-06-24 | 1995-11-08 | ミサワホーム株式会社 | Cellulosic fine particles, wood-like molded products and wood-like products |
| AU663651B2 (en) * | 1993-03-05 | 1995-10-12 | Misawa Homes Co., Ltd. | Method of manufacturing wood-like product and the product |
-
1997
- 1997-03-28 AU AU21767/97A patent/AU2176797A/en not_active Abandoned
- 1997-03-28 CA CA002255859A patent/CA2255859A1/en not_active Abandoned
- 1997-03-28 WO PCT/JP1997/001076 patent/WO1998043792A1/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| AU2176797A (en) | 1998-10-22 |
| WO1998043792A1 (en) | 1998-10-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |